WO2001031284A1 - Dual-mass flywheel for internal combustion engines - Google Patents

Dual-mass flywheel for internal combustion engines Download PDF

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Publication number
WO2001031284A1
WO2001031284A1 PCT/EP2000/010406 EP0010406W WO0131284A1 WO 2001031284 A1 WO2001031284 A1 WO 2001031284A1 EP 0010406 W EP0010406 W EP 0010406W WO 0131284 A1 WO0131284 A1 WO 0131284A1
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WO
WIPO (PCT)
Prior art keywords
flywheel
drive
starter generator
rotor
dual
Prior art date
Application number
PCT/EP2000/010406
Other languages
German (de)
French (fr)
Inventor
Hans-Gerd Eckel
Anja Kunkel
Bernhard Röhrig
Lydia Weiss
Original Assignee
Carl Freudenberg Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Freudenberg Kg filed Critical Carl Freudenberg Kg
Priority to AU13862/01A priority Critical patent/AU1386201A/en
Priority to EP00975895A priority patent/EP1224429A1/en
Publication of WO2001031284A1 publication Critical patent/WO2001031284A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses
    • F16F15/13164—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses characterised by the supporting arrangement of the damper unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/18—Suppression of vibrations in rotating systems by making use of members moving with the system using electric, magnetic or electromagnetic means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/02—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B60K2006/268—Electric drive motor starts the engine, i.e. used as starter motor

Definitions

  • the invention relates to a dual-mass flywheel for internal combustion engines with a drive-side flywheel and an output-side flywheel, which are mounted concentrically to one another and connected to one another via a torque-transmitted torsion spring and can be rotated relative to one another to a limited extent, and to an electric starter generator, the rotor of which is connected to the flywheel.
  • Flywheels of motor vehicles with manual transmissions and a high level of comfort are usually designed as dual mass flywheels, the drive-side flywheel rigidly connected to the crankshaft of the engine and the drive-side flywheel forming part of the motor vehicle clutch being connected to one another via at least one torsion spring.
  • the torsion spring usually consists of a plurality of helical compression springs arranged in the circumferential direction; it serves to isolate vibrations in the drive train of the motor vehicle.
  • Such a two-mass flywheel is known (DE 36 21 997 A1).
  • the relatively high weight is perceived as disadvantageous, which is essentially determined by the two flywheels.
  • the drive-side flywheel is designed to be as inert as possible and the torsion spring is made as soft as possible.
  • electric starter generators Compared to electric starters, which are mechanically coupled to the flywheel only for the starting process of the internal combustion engine, electric starter generators have the essential advantage that the mechanical starting energy is transmitted without contact and thus without wear. In addition, the starting process does not cause any additional noise, so that an automatic start-stop system with frequently required starting processes can be implemented.
  • the rotor is connected directly to the flywheel or to the drive-side flywheel of the dual-mass flywheel and is therefore in direct drive connection with the crankshaft.
  • the mass of the flywheel is increased overall, which in turn leads to an increase in the total weight of the Internal combustion engine with its drive train and thus to an undesirable increase in the vehicle weight, but on the other hand also to an increase in the rotating mass of the internal combustion engine, which results in greater inertia against rapid speed changes.
  • the object of the invention is therefore to design a two-mass flywheel for internal combustion engines of the type mentioned in such a way that the disadvantages mentioned, in particular an increase in the flywheel mass, are avoided by using the electric starter generator.
  • This object is achieved in that the rotor of the starter generator is connected to the flywheel on the output side.
  • the flywheel ring on the output side For effective torsional vibration damping in a two-mass flywheel, it is necessary for the flywheel ring on the output side to have a sufficiently large mass. If the rotor of the electric starter generator is connected according to the invention to the flywheel on the output side, its mass can be reduced to the same extent that its mass is increased by the attachment of the rotor.
  • the total mass of the component consisting of the flywheel ring on the output side and the rotor of the starter generator can therefore be selected to be approximately as large as that of a flywheel ring on the output side without a rotor.
  • the rotor of the starter generator does not have to contribute to increasing the mass of the internal combustion engine.
  • torsional vibrations caused by the internal combustion engine do not lead to nonuniformity of the rotor rotation, because these torsional vibrations are largely eliminated during the torque transmission from the drive-side flywheel to the output-side flywheel.
  • the flywheel mass requirement on the motor side is usually sufficiently covered by the primary inertia of the dual-mass flywheel, so that the arrangement of the inertia of the armature of the electric machine on the secondary side allows the drive train to settle to a much greater extent.
  • the higher torsional inertia on the secondary side of the dual-mass flywheel enables the use of a stiffer torsion spring between the primary and secondary flywheel mass and thus a stiffer coupling between the engine and vehicle with improved longitudinal dynamics.
  • the starting height can also be significantly reduced and the mass and the inertia on the primary side can be reduced.
  • the substantially ring-shaped rotor of the starter generator is mounted laterally on the peripheral edge of the drive-side flywheel ring, preferably on the side of the drive-side flywheel ring on the drive-side flywheel ring. This results in a space-saving arrangement for the starter generator.
  • the starter generator and the drive-side flywheel are arranged radially one inside the other.
  • the rotor of the starter generator is arranged radially outside the circumference of the drive-side flywheel. This contributes in particular to a space-saving arrangement, taking into account that it is sufficient for reasons of torsional vibration damping, the drive-side flywheel with a relatively low mass and thus smaller diameter than the flywheel ring on the output side. The difference in diameter of the two flywheel rings resulting from this consideration is used here to provide space for the arrangement of the starter generator
  • the torsion spring of the dual-mass flywheel can be designed to be bridgeable, for example by an electromechanical device. This creates the possibility of establishing a direct, largely torsionally rigid connection from the starter generator to the crankshaft for the starting process
  • the drawing shows an axial section of a two-mass flywheel 1 in a driveline of a motor vehicle, only the parts above the axis of rotation 2 being shown in section
  • An anti-flywheel ring 3 is connected to the crankshaft (not shown) of the motor vehicle engine and is flanged, for example, to the flange of the crankshaft by means of screws 4
  • a torsion spring 7 is arranged between the drive-side flywheel 3 and the driven-side flywheel 5.
  • a clutch disc 12 is connected to a transmission input shaft 14 of the motor vehicle by means of a splined hub 13.
  • the clutch disc 12 is arranged between a clutch surface 14 of the drive-side flywheel 5 and a movable pressure plate 15, which is acted upon in the axial direction by a pressure spring 16 designed as a plate spring.
  • the pressure spring 16 is movably mounted on pins 17 on a clutch cover 18 connected to the drive-side flywheel 5 and is actuated by a disengaging sleeve 19 via a thrust bearing 20 designed as a roller bearing.
  • the internal combustion engine on the crankshaft of which the dual-mass flywheel 1 is attached, is equipped with an electric starter generator 21, which is designed, for example, as an electrical asynchronous machine and is used both for generating the required electrical energy and for starting the internal combustion engine.
  • an electric starter generator 21 which is designed, for example, as an electrical asynchronous machine and is used both for generating the required electrical energy and for starting the internal combustion engine.
  • the starter generator 21 has a starter 22 connected to the (not shown) housing of the internal combustion engine, which essentially consists of a stator winding 23 and a stator laminated core 24.
  • the starter generator 21 has a rotor 25, the rotor winding 26 and the rotor laminated core 27 are attached to a support ring 28, which is attached laterally to the drive-side flywheel 5 by means of fastening screws 29.
  • the essentially ring-shaped rotor 25 of the starter generator 21 is attached to the drive-side flywheel 5 on the side facing the drive-side flywheel 3 and surrounds the circumference of the drive-side flywheel ring 3.
  • the drive-side flywheel 3 is designed with a much smaller diameter than the output-side flywheel 5.
  • the resultant annular step laterally next to the peripheral edge of the drive-side flywheel 5 and outside the circumference of the drive-side flywheel 3 is essentially filled by the starter generator 21, so that there is only an insignificantly higher space requirement for this.

Abstract

A dual-mass flywheel (1) for internal combustion engines has a flywheel ring (3) on the input side and a flywheel ring (5) on the output side which are mounted concentrically in relation to one another, are interconnected via a torque transmitting torsion spring (7) and can only rotate in a restricted manner in relation to one another. The rotor (25) of an electric starter generator (21) is connected to the flywheel ring (5) on the output side. The substantially annular rotor (25) is fitted to the side of the flywheel (5) on the output side which faces towards the flywheel (3) on the input side.

Description

Zweimassen-Schwungrad für BrennkraftmaschinenDual mass flywheel for internal combustion engines
Die Erfindung betrifft ein Zweimassen-Schwungrad für Brennkraftmaschinen mit einem antriebsseitigen Schwungring und einem abtriebsseitigen Schwungring, die konzentrisch zueinander gelagert und über eine drehmomentübertragene Drehfeder miteinander verbunden und relativ zueinander begrenzt verdrehbar sind, sowie mit einem elektrischen Startergenerator, dessen Rotor mit dem Schwungrad verbunden ist.The invention relates to a dual-mass flywheel for internal combustion engines with a drive-side flywheel and an output-side flywheel, which are mounted concentrically to one another and connected to one another via a torque-transmitted torsion spring and can be rotated relative to one another to a limited extent, and to an electric starter generator, the rotor of which is connected to the flywheel.
Schwungräder von Kraftfahrzeugen mit Schaltgetrieben und hohem Komfortanspruch sind üblicherweise als Zweimassen^Schwungräder ausgeführt, wobei der mit der Kurbelwelle des Motors starr verbundene, antriebsseitige Schwungring und der einen Teil der Kraftfahrzeugkupplung bildende antriebsseitige Schwungring über mindestens eine Drehfeder miteinander verbunden sind. Die Drehfeder besteht üblicherweise aus mehreren, in Umfangsrichtung angeordneten Schraubendruckfedem; sie dient der Schwingungsisolation im Triebstrang des Kraftfahrzeugs.Flywheels of motor vehicles with manual transmissions and a high level of comfort are usually designed as dual mass flywheels, the drive-side flywheel rigidly connected to the crankshaft of the engine and the drive-side flywheel forming part of the motor vehicle clutch being connected to one another via at least one torsion spring. The torsion spring usually consists of a plurality of helical compression springs arranged in the circumferential direction; it serves to isolate vibrations in the drive train of the motor vehicle.
Ein derartiges Zweimassen-Schwungrad ist bekannt (DE 36 21 997 A1). Hierbei wird das verhältnismäßig hohe Gewicht als nachteilig empfunden, das im wesentlichen von den beiden Schwungringen bestimmt wird. Zur Erzielung einer guten Schwingungsisolation wird der abtriebsseitige Schwungring möglichst rotatorisch träge und die Drehfeder möglichst weich ausgeführt. Anstelle der herkömmlichen Ausführung von Brennkraftmaschinen mit einem gesonderten elektrischen Generator, der üblicherweise über einen Riementrieb mit der Kurbelwelle verbunden ist und einem gesonderten elektrischen Starter, der über einen schaltbaren Zahnradtrieb nur für den Startvorgang an die Schwungscheibe ankuppelbar ist, ist die Verwendung eines diese beiden Funktionen zusammenfassenden elektrischen Startergenerators bekannt, der wegen der direkten und ständigen Antriebsverbindung seines Rotors mit der Kurbelwelle der Brennkraftmaschine auch als Kurbelwellen-Startergenerator bezeichnet wird.Such a two-mass flywheel is known (DE 36 21 997 A1). Here, the relatively high weight is perceived as disadvantageous, which is essentially determined by the two flywheels. In order to achieve good vibration isolation, the drive-side flywheel is designed to be as inert as possible and the torsion spring is made as soft as possible. Instead of the conventional design of internal combustion engines with a separate electric generator, which is usually connected to the crankshaft via a belt drive and a separate electric starter, which can only be coupled to the flywheel for the starting process via a switchable gear drive, the use of one of these two functions is possible summarizing known electric starter generator, which is also referred to as a crankshaft starter generator because of the direct and permanent drive connection of its rotor to the crankshaft of the internal combustion engine.
Diese technische Entwicklung trägt dem Umstand Rechnung, daß für den Betrieb von Brennkraftmaschinen ein zunehmend größerer elektrischer Energiebedarf besteht, der insbesondere noch gesteigert wird, wenn ein elektromagnetische Ventilantrieb vorgesehen wird. Insbesondere besteht dieser hohe Energiebedarf bereits bei sehr geringen Drehzahlen der Brennkraftmaschine.This technical development takes account of the fact that there is an increasingly greater electrical energy requirement for the operation of internal combustion engines, which is increased in particular if an electromagnetic valve drive is provided. In particular, this high energy requirement already exists at very low engine speeds.
Gegenüber elektrischen Startern, die nur für den Startvorgang der Brennkraft- maschine mechanisch an das Schwungrad angekoppelt werden, haben elektrische Startergeneratoren den wesentlichen Vorteil, daß die Übertragung der mechanischen Startenergie berührungslos und somit verschleißfrei erfolgt. Außerdem verursacht der Startvorgang keine zusätzlichen Geräusche, so daß eine Start-Stopp-Automatik mit häufig notwendigen Startvorgängen realisiert werden kann.Compared to electric starters, which are mechanically coupled to the flywheel only for the starting process of the internal combustion engine, electric starter generators have the essential advantage that the mechanical starting energy is transmitted without contact and thus without wear. In addition, the starting process does not cause any additional noise, so that an automatic start-stop system with frequently required starting processes can be implemented.
Bei bekannten elektrischen Startergeneratoren ist der Rotor direkt mit dem Schwungrad oder mit dem antriebsseitigen Schwungring des Zweimassen- Schwungrads verbunden und steht somit in unmittelbarer Antriebsverbindung mit der Kurbelwelle. Dadurch wird die Masse des Schwungrads insgesamt erhöht, was einerseits zu einer Erhöhung des Gesamtgewichts der Brennkraftmaschine mit ihrem Antriebsstrang und damit zu einer unerwünschten Erhöhung des Fahrzeuggewichts, andererseits aber auch zu einer Erhöhung der Drehmasse der Brennkraftmaschine führt, wodurch sich eine größere Trägheit gegen schnelle Drehzahlwechsel ergibt.In known electric starter generators, the rotor is connected directly to the flywheel or to the drive-side flywheel of the dual-mass flywheel and is therefore in direct drive connection with the crankshaft. As a result, the mass of the flywheel is increased overall, which in turn leads to an increase in the total weight of the Internal combustion engine with its drive train and thus to an undesirable increase in the vehicle weight, but on the other hand also to an increase in the rotating mass of the internal combustion engine, which results in greater inertia against rapid speed changes.
Aufgabe der Erfindung ist es daher, ein Zweimassen-Schwungrad für Brennkraftmaschinen der eingangs genannten Gattung so auszubilden, daß die genannten Nachteile, insbesondere auch eine Erhöhung der Schwungradmasse durch den Einsatz des elektrischen Startergenerators vermieden werden.The object of the invention is therefore to design a two-mass flywheel for internal combustion engines of the type mentioned in such a way that the disadvantages mentioned, in particular an increase in the flywheel mass, are avoided by using the electric starter generator.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Rotor des Startergenerators mit dem abtriebsseitigen Schwungring verbunden ist.This object is achieved in that the rotor of the starter generator is connected to the flywheel on the output side.
Für eine wirksame Drehschwingungsdämpfung bei einem Zweimassen- Schwungrad ist es erforderlich, daß der abtriebsseitige Schwungring eine ausreichend große Masse besitzt. Wenn der Rotor des elektrischen Startergenerators erfindungsgemäß mit dem abtriebsseitigen Schwungring verbunden wird, so kann dessen Masse in gleichem Umfang verringert werden, in dem seine Masse durch die Anbringung des Rotors erhöht wird. Die Gesamtmasse des aus dem abtriebsseitigen Schwungring und dem Rotor des Startergenerators bestehenden Bauteils kann daher angenähert ebenso groß gewählt werden wie die eines abtriebsseitigen Schwungrings ohne Rotor. Der Rotor des Startergenerators muß somit nicht zur Erhöhung der Masse der Brennkraftmaschine beitragen.For effective torsional vibration damping in a two-mass flywheel, it is necessary for the flywheel ring on the output side to have a sufficiently large mass. If the rotor of the electric starter generator is connected according to the invention to the flywheel on the output side, its mass can be reduced to the same extent that its mass is increased by the attachment of the rotor. The total mass of the component consisting of the flywheel ring on the output side and the rotor of the starter generator can therefore be selected to be approximately as large as that of a flywheel ring on the output side without a rotor. The rotor of the starter generator does not have to contribute to increasing the mass of the internal combustion engine.
Darüber hinaus ist es auch für den Generatorbetrieb besonders vorteilhaft, wenn durch die Brennkraftmaschine verursachte Drehschwingungen nicht zu einer Ungleichförmigkeit der Rotordrehung führen, weil diese Drehschwingungen bereits bei der Drehmomentübertragung von dem antriebsseitigen Schwungring auf den abtriebsseitigen Schwungring weitgehend eliminiert werden. Der Schwungmassenbedarf auf der Motorseite ist mit der primärseitigen Drehträgheit des Zweimassen-Schwungrades in der Regel ausreichend gedeckt, so daß bei der Anordnung der Drehträgheit des Ankers der Elektromaschine auf der Sekundärseite die Beruhigung des Antriebsstrangs in weit höherem Maße ermöglicht wird. Des weiteren ermöglicht die höhere Drehträgheit auf der Sekundärseite des Zweimassen-Schwungrades die Verwendung einer steiferen Drehfeder zwischen der Primär- und der Sekundärschwungmasse und damit eine steifere Kopplung zwischen Motor und Fahrzeug mit verbesserten Längsdynamik.In addition, it is also particularly advantageous for generator operation if torsional vibrations caused by the internal combustion engine do not lead to nonuniformity of the rotor rotation, because these torsional vibrations are largely eliminated during the torque transmission from the drive-side flywheel to the output-side flywheel. The flywheel mass requirement on the motor side is usually sufficiently covered by the primary inertia of the dual-mass flywheel, so that the arrangement of the inertia of the armature of the electric machine on the secondary side allows the drive train to settle to a much greater extent. Furthermore, the higher torsional inertia on the secondary side of the dual-mass flywheel enables the use of a stiffer torsion spring between the primary and secondary flywheel mass and thus a stiffer coupling between the engine and vehicle with improved longitudinal dynamics.
Bei Verwendung eines drehzahladaptiven Tilgers auf der Primärseite des Zweimassen-Schwungrades lässt sich darüber hinaus die Anregehöhe deutlich reduzieren und die Masse und die Drehträgheit auf der Primärseite verringern.When using a speed-adaptive damper on the primary side of the dual-mass flywheel, the starting height can also be significantly reduced and the mass and the inertia on the primary side can be reduced.
Gemäß einer bevorzugten Ausführungsform der Erfindung ist vorgesehen, daß der im wesentlichen ringförmige Rotor des Startergenerators seitlich am Umfangsrand des abtriebsseitigen Schwungrings angebracht ist, und zwar vorzugsweise auf der dem antriebsseitigen Schwungring zugekehrten Seite am abtriebsseitigen Schwungring. Dadurch ergibt sich eine platzsparende Anordnung für den Startergenerator.According to a preferred embodiment of the invention, it is provided that the substantially ring-shaped rotor of the starter generator is mounted laterally on the peripheral edge of the drive-side flywheel ring, preferably on the side of the drive-side flywheel ring on the drive-side flywheel ring. This results in a space-saving arrangement for the starter generator.
Gemäß einer vorteilhaften Ausführung der Erfindung sind der Startergenerator und der abtriebsseitige Schwungring radial ineinander angeordnet.According to an advantageous embodiment of the invention, the starter generator and the drive-side flywheel are arranged radially one inside the other.
Gemäß einer besonders bevorzugten Ausführungsform der Erfindung ist vorgesehen, daß der Rotor des Startergenerators radial außerhalb des Umfangs des antriebsseitigen Schwungrings angeordnet ist. Dies trägt im besonderen Maße zu einer platzsparenden Anordnung bei, wobei berücksichtigt wird, daß es aus Gründen der Drehschwingungsdämpfung ausreicht, den antriebsseitigen Schwungring mit verhältnismäßig geringer Masse und damit geringerem Durchmesser als den abtriebsseitigen Schwungring auszufuhren Der sich aus dieser Überlegung ergebende Durchmesserunterschied der beiden Schwungringe wird hierbei ausgenutzt, um einen Raum für die Anordnung des Startergenerators zur Verfugung zu stellenAccording to a particularly preferred embodiment of the invention, it is provided that the rotor of the starter generator is arranged radially outside the circumference of the drive-side flywheel. This contributes in particular to a space-saving arrangement, taking into account that it is sufficient for reasons of torsional vibration damping, the drive-side flywheel with a relatively low mass and thus smaller diameter than the flywheel ring on the output side. The difference in diameter of the two flywheel rings resulting from this consideration is used here to provide space for the arrangement of the starter generator
Die Drehfeder des Zweimassen-Schwungrades kann uberbruckbar ausgeführt sein, beispielsweise durch eine elektromechanische Einrichtung Damit wird die Möglichkeit geschaffen, für den Startvorgang eine direkte, weitestgehend drehsteife Verbindung von Startergenerator zur Kurbelwelle herzustellenThe torsion spring of the dual-mass flywheel can be designed to be bridgeable, for example by an electromechanical device. This creates the possibility of establishing a direct, largely torsionally rigid connection from the starter generator to the crankshaft for the starting process
Nachfolgend wird ein Ausfuhrungsbeispiel der Erfindung naher erläutert, das in der Zeichnung dargestellt istAn exemplary embodiment of the invention is explained in more detail below, which is shown in the drawing
Die Zeichnung zeigt in einem Axialschnitt ein Zweimassen-Schwungrad 1 in einem Tπebstrang eines Kraftfahrzeugs, wobei im Schnitt nur die oberhalb der Drehachse 2 liegenden Teile dargestellt sindThe drawing shows an axial section of a two-mass flywheel 1 in a driveline of a motor vehicle, only the parts above the axis of rotation 2 being shown in section
Ein antπebsseitiger Schwungring 3 ist mit der (nicht dargestellten) Kurbelwelle des Kraftfahrzeugmotors verbunden und beispielsweise am Flansch der Kurbelwelle mittels Schrauben 4 angeflanschi Ein abtπebsseitiger SchwungringAn anti-flywheel ring 3 is connected to the crankshaft (not shown) of the motor vehicle engine and is flanged, for example, to the flange of the crankshaft by means of screws 4
5 ist an einer Nabe 3a des antriebsseitigen Schwungrings 3 über ein Walzlager5 is on a hub 3a of the drive-side flywheel 3 via a roller bearing
6 gelagert, so daß der abtriebsseitige Schwungring 5 konzentrisch zu dem antriebsseitigen Schwungring 3 und relativ zu diesem um die Drehachse 2 drehbar ist6 mounted so that the output-side flywheel 5 is rotatable concentrically to the drive-side flywheel 3 and relative to the latter about the axis of rotation 2
Zur Verminderung einer Drehschwingungsubertragung ist zwischen dem antriebsseitigen Schwungring 3 und dem abtriebsseitigen Schwungring 5 eine Drehfeder 7 angeordnel Die Drehfeder 7 weist am Umfang verteilt mehrere Schraubendruckfedern 8 auf, die sich jeweils in Umfangsπchtung sowohl am antriebsseitigen Schwungring 3 als auch an Armen 9 einer Ubertragungsschei- be 10 abstützen, die über Niete 11 mit dem abtriebsseitigen Schwungring 5 starr verbunden ist.To reduce the transmission of torsional vibrations, a torsion spring 7 is arranged between the drive-side flywheel 3 and the driven-side flywheel 5. Support be 10, which is rigidly connected via rivets 11 with the drive-side flywheel 5.
Eine Kupplungscheibe 12 ist mittels einer Vielkeilnabe 13 mit einer Getriebeeingangswelle 14 des Kraftfahrzeugs verbunden. Die Kupplungsscheibe 12 ist zwischen einer Kupplungsfläche 14 des abtriebsseitigen Schwungrings 5 und einer beweglichen Druckplatte 15 angeordnet, die in axialer Richtung von einer als Tellerfeder ausgeführten Anpressfeder 16 beaufschlagt wird. Die Anpressfeder 16 ist an Zapfen 17 an einem mit dem abtriebsseitigen Schwungring 5 verbundenen Kupplungsdeckel 18 beweglich gelagert und wird durch eine Ausrückmuffe 19 über ein als Wälzlager ausgeführtes Drucklager 20 betätigt.A clutch disc 12 is connected to a transmission input shaft 14 of the motor vehicle by means of a splined hub 13. The clutch disc 12 is arranged between a clutch surface 14 of the drive-side flywheel 5 and a movable pressure plate 15, which is acted upon in the axial direction by a pressure spring 16 designed as a plate spring. The pressure spring 16 is movably mounted on pins 17 on a clutch cover 18 connected to the drive-side flywheel 5 and is actuated by a disengaging sleeve 19 via a thrust bearing 20 designed as a roller bearing.
Die Brennkraftmaschine, an deren Kurbelwelle das Zweimassen-Schwungrad 1 befestigt ist, ist mit einem elektrischen Startergenerator 21 ausgerüstet, der beispielsweise als elektrische Asynchronmaschine ausgeführt ist und sowohl für die Erzeugung der erforderlichen elektrischen Energie als auch für den Startvorgang der Brennkraftmaschine dient.The internal combustion engine, on the crankshaft of which the dual-mass flywheel 1 is attached, is equipped with an electric starter generator 21, which is designed, for example, as an electrical asynchronous machine and is used both for generating the required electrical energy and for starting the internal combustion engine.
Der Startergenerator 21 weist einen mit dem (nicht dargestellten) Gehäuse der Brennkraftmaschine verbundenen Startor 22 auf, der im wesentlichen aus einer Statorwicklung 23 und einem Statorblechpaket 24 besteht. Der Startergenerator 21 weist einen Rotor 25 auf, dessen Rotorwicklung 26 und Rotorblechpaket 27 auf einem Tragring 28 angebracht sind, der mittels Befestigungsschrauben 29 seitlich am abtriebsseitigen Schwungring 5 angebracht ist. Der im wesentlichen ringförmige Rotor 25 des Startergenerators 21 ist auf der dem antriebsseitigen Schwungring 3 zugekehrten Seite am abtriebsseitigen Schwungring 5 angebracht und umgibt den Umfang des antriebsseitigen Schwungrings 3.The starter generator 21 has a starter 22 connected to the (not shown) housing of the internal combustion engine, which essentially consists of a stator winding 23 and a stator laminated core 24. The starter generator 21 has a rotor 25, the rotor winding 26 and the rotor laminated core 27 are attached to a support ring 28, which is attached laterally to the drive-side flywheel 5 by means of fastening screws 29. The essentially ring-shaped rotor 25 of the starter generator 21 is attached to the drive-side flywheel 5 on the side facing the drive-side flywheel 3 and surrounds the circumference of the drive-side flywheel ring 3.
Der antriebsseitige Schwungring 3 ist mit wesentlich geringerem Durchmesser ausgeführt als der abtriebsseitige Schwungring 5. Die sich dadurch ergebende ringförmige Stufe seitlich neben dem Umfangsrand des abtriebsseitigen Schwungrings 5 und außerhalb des Umfangs des antriebsseitigen Schwungrings 3 wird im wesentlichen durch den Startergenerator 21 ausgefüllt, so daß hierfür nur ein unwesentlich höherer Raumbedarf besteht. The drive-side flywheel 3 is designed with a much smaller diameter than the output-side flywheel 5. The resultant annular step laterally next to the peripheral edge of the drive-side flywheel 5 and outside the circumference of the drive-side flywheel 3 is essentially filled by the starter generator 21, so that there is only an insignificantly higher space requirement for this.

Claims

Patentansprüche claims
1. Zweimassen-Schwungrad für Brennkraftmaschinen mit einem antriebsseitigen Schwungring und einem abtriebsseitigen Schwungring, die konzentrisch zueinander gelagert und über eine drehmomentübertragene Drehfeder miteinander verbunden und relativ zueinander begrenzt verdrehbar sind, sowie mit einem elektrischen Startergenerator, dessen Rotor mit dem Schwungrad verbunden ist, dadurch gekennzeichnet, daß der Rotor (25) des Startergenerators (21 ) mit dem abtriebsseitigen Schwungring (5) verbunden ist.1. Dual-mass flywheel for internal combustion engines with a drive-side flywheel and an output-side flywheel, which are mounted concentrically to one another and connected to one another via a torque-transmitting torsion spring and can be rotated to a limited extent relative to one another, and with an electric starter generator whose rotor is connected to the flywheel that the rotor (25) of the starter generator (21) is connected to the flywheel ring (5) on the output side.
2. Zweimassen-Schwungrad nach Anspruch 1 , dadurch gekennzeichnet, daß der im wesentlichen ringförmige Rotor (25) des Startergenerators (21 ) seitlich am Umfangsrand des abtriebsseitigen Schwungrings (5) angebracht ist.2. Dual mass flywheel according to claim 1, characterized in that the substantially annular rotor (25) of the starter generator (21) is attached laterally on the peripheral edge of the driven side flywheel (5).
3. Zweimassen-Schwungrad nach Anspruch 1 , dadurch gekennzeichnet, daß der Startergenerator (21 ) und der abtriebsseitige Schwungring (5) radial ineinander angeordnet sind.3. Two-mass flywheel according to claim 1, characterized in that the starter generator (21) and the output-side flywheel (5) are arranged radially one inside the other.
4. Zweimassen-Schwungrad nach Anspruch 2, dadurch gekennzeichnet, daß der Rotor (25) des Startergenerators (21 ) auf der dem antriebsseitigen Schwungring (3) zugekehrten Seite am abtriebsseitigen Schwungring (5) angebracht ist.4. Two-mass flywheel according to claim 2, characterized in that the rotor (25) of the starter generator (21) on the drive-side flywheel (3) facing side is attached to the output-side flywheel (5).
5. Zweimassen-Schwungrad nach Anspruch 4, dadurch gekennzeichnet, daß der Rotor (25) des Startergenerators (21 ) radial außerhalb des Umfangs des antriebsseitigen Schwungrings (3) angeordnet ist. Zweimassen-Schwungrad nach einem der Ansprüche 1-5, dadurch gekennzeichnet, daß die Drehfeder (7) des Zweimassen-Schwungrades (1 ) überbrückbar ist. 5. Dual mass flywheel according to claim 4, characterized in that the rotor (25) of the starter generator (21) is arranged radially outside the circumference of the drive-side flywheel (3). Dual mass flywheel according to one of claims 1-5, characterized in that the torsion spring (7) of the dual mass flywheel (1) can be bridged.
PCT/EP2000/010406 1999-10-27 2000-10-23 Dual-mass flywheel for internal combustion engines WO2001031284A1 (en)

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AU13862/01A AU1386201A (en) 1999-10-27 2000-10-23 Dual-mass flywheel for internal combustion engines
EP00975895A EP1224429A1 (en) 1999-10-27 2000-10-23 Dual-mass flywheel for internal combustion engines

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DE19951575A DE19951575C2 (en) 1999-10-27 1999-10-27 Dual mass flywheel for internal combustion engines
DE19951575.1 1999-10-27

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DE102005003077B4 (en) * 2005-01-22 2011-06-16 Audi Ag Drive unit for a motor vehicle
DE102007048443A1 (en) 2007-10-10 2009-04-16 Audi Ag Drive device for motor vehicles, has electric machine with axis of rotation, where electric machine is inclined against axis of rotation of force delivery shaft below given angle
DE112009002182B4 (en) * 2008-09-11 2019-04-25 Schaeffler Technologies AG & Co. KG Torque transfer device
DE102010061062B4 (en) 2010-12-07 2023-08-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft modular system
DE102012203611A1 (en) 2011-04-04 2012-10-04 Schaeffler Technologies AG & Co. KG Device for transmitting a torque
DE102014019547B3 (en) 2014-12-23 2016-05-12 Samson Ag Torque and angle sensor and actuator
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WO2003098069A1 (en) * 2002-05-15 2003-11-27 Daimlerchrysler Ag Device for connecting a crankshaft to a gear shaft
DE102006041891A1 (en) * 2006-09-06 2008-03-27 Schaeffler Kg Stator generator for internal-combustion engine, has vibration absorber with absorber body rotatable about rotating axis and gauge balanced in excitation frequency, where gauge is displaceable in plane with respect to absorber body

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EP1224429A1 (en) 2002-07-24
AU1386201A (en) 2001-05-08
DE19951575A1 (en) 2001-05-10
DE19951575C2 (en) 2003-06-18

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